They all have 128bit memory interface. If you want good gaming graphics then the 6200 is not for you. The Chaintech is a standard 6600 card good for better than average graphics. But the ad for the XFX is missing the GT at the end of the 6600. That means the XFX 6600GT is the better card with double the memory clock speed and double the memory bandwidth, perfect for most games and video editing software.